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Based on toxicology studies, benzimidazoles such as Fenbendazole, Mebendazole or Albendazole seem to be safe drugs.

However, a drug without any side-effects does not exist. Scientific data reports do not reveal significant adverse reactions from taking fenbendazole. Despite the fact, there are anecdotal reports of potential toxicity:

  • Up to 5 % of people can experience stomach discomfort or diarrhea when taking large quantities of fenbendazole with no breaks.
  • People with severe liver or kidney failure have lower medication excretion rates, therefore, fenbendazole can accumulate and cause unexpected side-effects. Doses should be divided accordingly in this situation.
  • When used in large quantities for a long period of time without breaks, fenbendazole can cause an asymptomatic liver enzyme increase due to the fact of the substance being mainly metabolized in the liver. This is reversible with the help of a couple week pause from the medication.

The protocol was designed to keep the liver in optimal health, therefore the schedule of weekly 3 days on, 4 days off was previously suggested. However, more and more people are using fenbendazole on a daily basis without problems.

We would still recommend taking at least 1 day off per week to avoid overstressing the liver if the medication is to be used for prolonged periods of time (like months or years).

To keep the liver health optimal, we advise you to take 250 mg capsules of Milk Thistle or 150 mg of Silymarin daily as a supportive supplement for keeping it in great shape.

This Post Has 7 Comments

  1. Selinda

    Does fenbendazole interact with blood thinners like warfarin/coumadin?

    1. fenbendazole

      Hello, Selinda, thank you for your question.
      Fenbendazole does not appear to have any significant reported interactions with blood thinners according to available data from various sources, including detailed drug interaction resources.

  2. Ann

    Does fenbendazole work well with urine therapy?

    1. fenbendazole

      Hello, Ann, thank you for a question.
      As of now, there are no available reports describing its efficacy in conjunction with urotherapy. The investigation of synergy or dissonance is lacking.

  3. Charlotte

    Can pregnant people take this?

    1. fenbendazole

      Hello, Charlotte.
      If you’re thinking about keeping up with Fenbendazole while pregnant, the best step is to chat with a doctor first since there’s no clear info on its safety during pregnancy in the documents we have. Also, keeping an eye on liver health might be a good idea, and maybe even taking it a bit easier with the dosing schedule could be wise. Just to play it safe for both mom and the little one on the way.

  4. Anthony Lopez

    FYI: I have been taking IVERMECTIN on and off for the prevention of covid for the past two and a half years – I tolerate it really well.

    Once again, thank you so much!

    Many blessings!

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